docs: def sql(self, stmt, parameters=None, bulk_parameters=None):
          """
          Execute SQL stmt against the crate server.
          """
          if stmt is None:
              return None
  
          data = _create_sql_payload(stmt, parameters, bulk_parameters)
          logger.debug(
              'Sending request to %s with payload: %s', self.path, data)
          content = self._json_request('POST', self.path, data=data)
          logger.debug("JSON response for stmt(%s): %s", stmt, content)
  
          return content